CN206451436U - A kind of joule law tester - Google Patents
A kind of joule law tester Download PDFInfo
- Publication number
- CN206451436U CN206451436U CN201621066790.4U CN201621066790U CN206451436U CN 206451436 U CN206451436 U CN 206451436U CN 201621066790 U CN201621066790 U CN 201621066790U CN 206451436 U CN206451436 U CN 206451436U
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- resistance
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Abstract
The utility model is a kind of joule law tester, including some experiment buckets being arranged side by side, resistance and thermometer are respectively equipped with each experiment bucket, also include the PCB covered in experiment bucket, resistance is electrically connected PCB and longer wire makes resistance stretch into experiment bucket by wire, and thermometer is stretched into experiment bucket through default through hole in PCB；1. integrated design, built-in heating element（Containing series parallel circuits）, digital display ammeter；Switch on power, connection temperature sensor can just be tested, and the Preparatory work of experiment time is short.2. there are 6 experiment cavitys（There is inside and outside heat-preserving container）, influence of the ambient temperature to experiment be smaller.3. heater element is precision resister, resistance is more accurate, and experiment current value is more accurate.4. test medium can be air, it is also possible to kerosene.5. a tester is direct temperature measurement degree, more intuitively.
Description
Technical field
The utility model is related to a kind of tester, is specifically a kind of joule law tester, belongs to teaching demonstration and sets
Standby technical field.
Background technology
Joule law tester is used to verify electrical conductor liberated heat and current strength, conductor resistance, conduction time
Relation Q=I2Rt, this is the experiment that must be done in physics teaching in secondary school.Usual experimental method has two kinds：
A. with 2-3 groups calorimetric bucket combination experiment；Advantage：There are heat-insulation layer, influence of the isolation ambient temperature to experiment；Shortcoming：
Need to do experiment in series or in parallel with calorimetric bucket more than two, experiment equipment is built difficult, and time is longer.
B. Joule law demonstrator；Advantage：Comparison of experiment results is easily intuitively observed；Shortcoming：It is indirect with liquid level
Heat height is represented, lecture experiment is only used for.
Utility model content
The technical problem that the utility model is solved is to provide a kind of integrated design, tests accurate Joule's law reality
Test device.
The utility model patent is achieved through the following technical solutions：
A kind of joule law tester, including some experiment buckets being arranged side by side, electricity is respectively equipped with each experiment bucket
Resistance and thermometer, in addition to the PCB covered in experiment bucket, resistance are electrically connected PCB circuit boards and longer by wire
Wire makes resistance stretch into experiment bucket, and thermometer is stretched into experiment bucket through default through hole in PCB.
The technical scheme that the utility model is further limited as：
Further, experiment bucket includes the multiple upper shed heat-preservation cylinders stood on base and the multiple insulations stood on substrate
In sleeve pipe, each thermal insulation casing correspondence one heat-preservation cylinder of insertion, and left between the outer wall of thermal insulation casing and the inwall of heat-preservation cylinder
Gap；PCB laminating is fixed on substrate, and each resistance in PCB is corresponded to respectively to be goed deep into inside thermal insulation casing,
PCB is provided with the through hole inserted for thermometer at correspondence thermal insulation casing.
Further, circuit of the PCB provided with two-way independence is respectively parallel circuit and series circuit, it is described simultaneously
Connection circuit include dc source and three groups of resistance circuits being connected in parallel between dc source be respectively first group of resistance circuit, second group
Resistance circuit and the 3rd group of resistance circuit, ammeter of first group of resistance circuit including order Electricity Federation, basic resistance, resistance value are
The secondary resistance of the first of basic resistance half and the switch for being connected in parallel on the first secondary resistance two ends, second group of resistance circuit include order electricity
The ammeter of connection, basic resistance, the resistance value second secondary resistance suitable with basic resistance and it is connected in parallel on the second secondary resistance two ends
Switch, the 3rd group of resistance circuit includes the ammeter and basic resistance of order Electricity Federation；The series circuit include dc source and
Three resistance being connected in dc source are respectively the first series resistance, the second series resistance and the 3rd series resistance, first
Series resistance, the second series resistance and the 3rd series resistance order double.
Further, thermometer is connected with the data acquisition computer communication of distal end in PCB.
The beneficial effects of the utility model are：
1. integrated design, built-in heating element (containing series parallel circuits), digital display ammeter；Switch on power, connect temperature
Sensor can just be tested, and the Preparatory work of experiment time is short.
2. there is 6 experiment cavitys (having inside and outside heat-preserving container), influence of the ambient temperature to experiment is smaller.
3. heater element is precision resister, resistance is more accurate, and experiment current value is more accurate.
4. test medium can be air, it is also possible to kerosene.
5. a tester is direct temperature measurement degree, more intuitively.
Brief description of the drawings
Fig. 1 is assembling schematic diagram of the present utility model；
Fig. 2 is use structural representation of the present utility model；
Fig. 3 is circuit diagram in the utility model；
Fig. 4 is circuit diagram in the utility model.
In figure：PCB 1, temperature inspecting hole 2, thermal insulation casing 3, resistance 4, heat-preservation cylinder 5, base 6, temperature sensor
Probe 7, power -line terminal 8.
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are apparent to, in conjunction with
Accompanying drawing is expanded on further how the utility model patent is implemented：
A kind of joule law tester, including it is divided to two rows the experiment bucket set, resistance 4 is respectively equipped with each experiment bucket
With the probe 7 of temperature sensor, in addition to the PCB 1 covered in experiment bucket, resistance 4 is electrically connected PCB circuits by wire
Plate 1 and longer wire makes resistance 4 stretch into experiment bucket, the probe 7 of temperature sensor is through default in PCB 1
Temperature inspecting hole 2 is stretched into experiment bucket.
Experiment bucket includes the 6 upper shed heat-preservation cylinders 5 stood on base 6 and 6 thermal insulation casings 3 stood on substrate, often
Between being left in the individual correspondence of thermal insulation casing 3 one heat-preservation cylinder 5 of insertion, and between the outer wall of thermal insulation casing 3 and the inwall of heat-preservation cylinder 5
Gap；The laminating of PCB 1 is fixed on substrate, and each resistance 4 in PCB 1 is corresponded to respectively to be goed deep into thermal insulation casing 3
Portion, PCB 1 is provided with the temperature inspecting hole 2 inserted for the probe 7 of temperature sensor at correspondence thermal insulation casing 3.
Working process and principle：
The latter half of circuit board is " series circuit " (relation of research heating effect of current and resistance) Q=I2Rt, with
Resistance (resistance) is directly proportional, and three are compared simultaneously, time t is identical.
1. the probe of temperature sensor is respectively inserted in into 3 Ω, 6 Ω, in 9 Ω rubber tip jacks, regulation plug and probe are high
In degree, insertion temp probe hole；
2. accessing student power source, voltage can not be more than 10V；
3. cut-in temperature sensor and computer set up connection；
4. opening DIS system softwares, click on " teaching material common software " " newly-built experiment ", select " quick experiment ", set up " temperature
Degree-time " coordinate relation, experimental period sets selection " 10 minutes ", acquisition interval selection " 1 second "；
5. closure switch, click on START button and start gathered data, turn on the power switch, connect circuit；
6. after experiment terminates, clicking " stopping " button, terminate experiment, analyze and preserve experimental data, pass through experimental data
It is not difficult to show that temperature increase amount is directly proportional to resistance.
The top half of circuit board is " parallel circuit " (relation of research heating effect of current and electric current) Q=I2Rt, with
Electric current square is directly proportional (three ammeters of correspondence can show the current value of three resistance), and three are compared simultaneously, and time t is phase
With.
Its experimentation is substantially consistent with series circuit, is not difficult to draw temperature increase amount and electric current by the data of collection
Square it is directly proportional.
Claims (4)
1. a kind of joule law tester, including some experiment buckets being arranged side by side, resistance is respectively equipped with each experiment bucket
And thermometer, it is characterised in that：Also include the PCB covered in experiment bucket, the resistance is electrically connected PCB circuits by wire
Plate and longer wire makes resistance stretch into experiment bucket, the thermometer stretches into reality through default through hole in PCB
Test in bucket.
2. joule law tester according to claim 1, it is characterised in that：The experiment bucket includes standing on base
Multiple upper shed heat-preservation cylinders and the multiple thermal insulation casings stood on substrate, each thermal insulation casing correspondence one heat-preservation cylinder of insertion
In, and leave gap between the outer wall of the thermal insulation casing and the inwall of heat-preservation cylinder；The PCB laminating is fixed on substrate
On, each resistance in PCB is corresponded to respectively to be goed deep into inside thermal insulation casing, and PCB is set at correspondence thermal insulation casing
There is the through hole inserted for thermometer.
3. joule law tester according to claim 1 or 2, it is characterised in that：The PCB is provided with two-way
Independent circuit is respectively parallel circuit and series circuit, and the parallel circuit includes dc source and is connected in parallel between dc source
Three groups of resistance circuits be respectively first group of resistance circuit, second group of resistance circuit and the 3rd group of resistance circuit, first group of resistance
The first secondary resistance of resistance half and the is connected in parallel on based on the ammeter of circuit including order Electricity Federation, basic resistance, resistance value
The switch at one secondary resistance two ends, second group of resistance circuit includes ammeter, basic resistance, resistance value and the basis electricity of order Electricity Federation
The second suitable secondary resistance of resistance and the switch for being connected in parallel on the second secondary resistance two ends, the 3rd group of resistance circuit include the electricity of order Electricity Federation
Flow table and basic resistance；Three resistance that the series circuit includes dc source and is connected in dc source are respectively first
Series resistance, the second series resistance and the 3rd series resistance, the first series resistance, the second series resistance and the 3rd series resistance are suitable
Sequence doubles.
4. joule law tester according to claim 1, it is characterised in that：In the PCB thermometer with
The data acquisition computer communication connection of distal end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621066790.4U CN206451436U (en) | 2016-09-20 | 2016-09-20 | A kind of joule law tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621066790.4U CN206451436U (en) | 2016-09-20 | 2016-09-20 | A kind of joule law tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206451436U true CN206451436U (en) | 2017-08-29 |
Family
ID=59661195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621066790.4U Active CN206451436U (en) | 2016-09-20 | 2016-09-20 | A kind of joule law tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206451436U (en) |
-
2016
- 2016-09-20 CN CN201621066790.4U patent/CN206451436U/en active Active
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